package com.hmdp.service.impl;

import cn.hutool.json.JSONUtil;
import com.hmdp.dto.Result;
import com.hmdp.entity.ShopType;
import com.hmdp.mapper.ShopTypeMapper;
import com.hmdp.service.IShopTypeService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

import static com.hmdp.utils.RedisConstants.SHOP_TYPE_KEY;


/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class ShopTypeServiceImpl extends ServiceImpl<ShopTypeMapper, ShopType> implements IShopTypeService {
    @Resource
    StringRedisTemplate stringRedisTemplate;
    @Override
    public Result queryTyeppeList() {
        String type = stringRedisTemplate.opsForValue().get(SHOP_TYPE_KEY);
        if (type!=null){
            List<ShopType> list = JSONUtil.toList(type, ShopType.class);
            return Result.ok(list);
        }
        List<ShopType> list = query().orderByAsc("sort").list();
        if(list==null) return Result.fail("数据库中没有相应分类");
        String typeJson = JSONUtil.toJsonStr(list);
        stringRedisTemplate.opsForValue().set(SHOP_TYPE_KEY,typeJson);
        return Result.ok(list);
    }
}
